21692193 has 4 divisors (see below), whose sum is σ = 28922928. Its totient is φ = 14461460.

The previous prime is 21692183. The next prime is 21692213. The reversal of 21692193 is 39129612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21692193 - 2⁵ = 21692161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21692113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3615363 + ... + 3615368.

It is an arithmetic number, because the mean of its divisors is an integer number (7230732).

Almost surely, 2^21692193 is an apocalyptic number.

It is an amenable number.

21692193 is a deficient number, since it is larger than the sum of its proper divisors (7230735).

21692193 is an equidigital number, since it uses as much as digits as its factorization.

21692193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7230734.

The product of its digits is 5832, while the sum is 33.

The square root of 21692193 is about 4657.4878421741. The cubic root of 21692193 is about 278.8909917027.

The spelling of 21692193 in words is "twenty-one million, six hundred ninety-two thousand, one hundred ninety-three".